Mold-facing device



July 5.192%. 1,634,266

W. D. MOORE MOLD FACING DEVICE Filed March 5, 1926 2 Sheets-Sheet 1INVENTOR /4 /1 MMJ MOO/7E July 5 1927. 1,634,266

7 w. D. MOORE MOLD FACING DEVICE Filed March 5, 1926 2 Sheets-Sheet zINVENTOR I474; 04/12 M0025 BY M TTORNEY lstented July 5,

o stares PATENT OFFICE.

\VILLIAM DA'V S MGOR-E, OF BIRMINGHAM, ALABAMA, ASSIGNOR TO SAND SIUNPATENTS CORTPORATION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELA-WARE.

MOLDAFA-CING DEVICE.

Application filed Mam; 5, 1926. Serial No. 92,452.

This invention is an improvement in mold *vices, and more particularlyin deautomatically and uniformly disfacings for refractory molds.preparation oi wet or green sand ids in accordance "with the process seth in application, Serial No. 38,704, filed r y 29, 1925, the mold isfaced with a uni emulsion of caiboni'lerous naterial, .3 1e final stepin the ereparation. Usually the facing is applied in emulsion. Theemulsion is thrown from a pail or other sri'able container into themold, and a irlihg motion is imparted to the emulsi'oi'i a skillfultwist applied at the proper o, thereby to evenly and uniformly disbutethe emulsion throughoutthe mold surface. 1 I

This method is entirely suitable and satisfactory ior molds wherein theboresareu'ni torn oi substantially uniform in cross sechowever, when themold is of variable cross section, the method is not so satisfac- As'for instancein applying the fac- Q from the spigot end the ring core ormetal. ling restricts the freedom of movement of the operator, and is anobstruction in the path of movement of the liquid as it is flung fromthe pail. The ring shields from the liquid a zone of the mold surfaceimmediately adjacent to the ring" and of a width varying with thethickness and depth of the ring. 7

ln molds for casting pipes with bell ends the flaring portion of themold presents difiiculties. This portion cannot be easily covered wi hthe facing from the spigot end and when the facing is applied from thebell end, the variable crosssection tends to de fleet the facingmaterial so that the portion of smaller diameter and uniform crosssection not uniformly covered.

Que of the primary objects 01 the presentinvention is the provision of asimple, inexpensive device for automatically distributing the selectedquantity of emulsion evenly and uniformly throughout theinold surface ofmolds wherein the bore is not of uniform cross section, as for instancein molds tor casting bell end pipes.- 1

irn'other object is the provision in such do vice. of means to constrainthe flowing liquid to iii-eve in both directions longitudinally of themold as it flows from the device, thereby to face that zone of the moldsurface above the point of discharge of "the emulsion.

Another object is the provision of means in such a device to correstdeflections of the emulsion away from the mold wall due to the wallconfiguration.

Another object is the provision of a simple inexpensive device of thecharacter specified, especially adapted for facing molds with bell endsfrom the bell end.

With these and other objects in view, th invention consists in theconstruction and novel combination of parts fully described hereinafter,illustrated in the accompanying drawings, and pointed out in the claimsap= pended hereto, it being understood that various changes in the form,proportion, size and minor details of construction within the scope theclaims, may be resorted to without departing from the spirit of theinvention.

In the drawings: v

Fig. 1 is a vertical section of one embodiment of the invention.

Fig. 2' isa plan View. s

Fig. 3 is a vertical section of another embod'm'ent. v

The embodiment of the invention illus-. tratedin Figs. 1 and 2 is shownin connec-' tion with a mold l of sand,which may be of the charactershown and described in the above mentioned application. The flask 2 inwhich the sand is held has at the spigot end of the mold av strippingplate 3, and a ring l of refractory material or metal is arranged withinthe end of the mold, just inside the stripping plate.

The improved device comprises a container or receptacle including a body5 having a discharge nozzle 6 of uniform cross section and usuallycylindrical. The body 5 is flaring or hopper shaped, and tapers towardsthe nozzle uniforml 'raduall mer in and same plane and abut an annularflange 8 on the nozzle, at the junction of the body therewith.

The flange 8 is of a diameter toflt within the stripping plate, and thenozzle is of a length such that when the wings abut the stripping plateat their lower ends, the nozzle will extend into the mold, and to adistance below the ring at. The external diameter of the nozzle issomewhatless than that of the ring 4, so that it passes easily throughthe ring core, or metal ring, and the thickness 01' the flange is lessthan that of the stripping plate, so that it does not engage theringcore, or metal ring.

The lower or discharge end of the nozzle may be closed by a disk valve9, which has a diameter substantially equal to the external diameter ofthe nozzle. The abutting edges of the nozzle and valve are beveled asshown, this arrangement facilitating the downward flow of the emulsion.The valve is connected to the lower end at a rod 10, the rod beingpassed through the valve at its axis, and engaged by stops 11 above andbelow the valve. A guide tube 12 is'provided tor the rod, at the axis01' the container, and the tube is supported by a spider 13 secured tothe container wall. At its upper end the rod passes through an openingin a cross bar l t to a swivel and pivotal connection with a lever 15.The lever is pivoted at one end between a pair of lugs 16 on the bar14:, and the other end is provided with a grip 17 as shown. The lever isalso provided with pivotal latch mechanism 18 cooperating with the bar14 to hold the grip end of: the lever lifted and the valve closed.

In operation the device is seated in the upper end of the mold in themanner shown in Fig. 1, the nozzle passing through the ring core ormetal ring, and the wings on gaging the stripping plate. The flange 8centersthe nozzle, and it Wlll be noticed that the flange will engagethe stripping plate before the nozzle engages the refractory or metalring 4:- ll ith the valve in the position of Fig. 1, and so held by thelatch, the container is supplied with the correct amount of emulsion.l/Vhen so supplied, tne latch is re leased, and the lever is pusheddown, moving the valve into the dotted line position of Fig. 1. Thevalve acts as a deflector or dasher directing the flow of liquidoutwardly neeaeec held is flared for the end of the mold which forms thebell of the casting. This end is also marginally flanged as shown at 23,and the ring plate 24 is engaged with the flared end, the ring beingrabbeted as shown at 25 to partially fit within the flanged end, and torest upon the flange 23. The rabbet 25 is at the inner face of the *ingand at the eX- terior, and the interior of the ring at the outer face isprovided with another rabbet 26.

The improved device comprises a container or receptacle 27 including abody of tapering formation or hopper shaped, the small end 01 thecontainer serving as the nozzle for de livering the emulsion. The smallend of the body is oi a size to pass through the ring 24-, and the bodyhas an annular rib 28 near the small end, which engages the rabbet 26,to properly centerthe container with respect to the flask and mold. Therib 28 is so placed that when engaged with the rabbet 26, the small endof the container will'be just below the ring 23 and slightly below themeeting plane of the ring and mold end.

The body has substantially triangular wings or vanes 29 at suitableintervals, and these wings are adapted to rest on the mold end and thering 24 as shown. The said wing ends are in the same plane and are soplaced with respect to the rib 28 that when the rib is fitted in therabbet 26, the wings will abut the ring. I

A valve is provided for closing the lower. end of the container. Thisvalve is in the form of a disk 30 having a hub 31 engaging a rod 32which is mounted to slide axially of the container. The rod is guided bya spider 38, arranged near the lower end of the container, anda crossbar 34: near the upper end. Referring to Fig. 3 it will be seen that theupper face of the disk is of spherical configuration so that all theemulsion is deflected outwardly.

When the valve is open in the dotted line position of Fig. 3, theemulsion flows out and strikes the mold wall. The contour of the wall atthis zone is substantially cylindrical with a rounded annular shoulder35 just below the cylindrical portion The emulsion is discharged withsufficient force to coat the mold wall as high as the ring 24, and theremainder of the emulsion flows downwardly in the manner shown.

There is a second ledge or shoulder 86 below the shoulder 85, and thisledge 36 is inclined as shown. The contour is such that the emulsionflowing down from the shoulder 35 is deflected by the shoulder 36inwardly, and were there nothing to'correct this deflection, the coatingof the wall would be defective. In order to correct the deflection atthe shoulder 86, a valve or deflector 37 is supported by the rod 32below the valve 30. This deflector has a hub 38 which abuts at its endthe hub 31 before mentioned, and the hubs are of a length to space thedeflector 3? from the deflector 30 a distance such that when the valve80 is open, the defleet-or 3? will be just below the shoulder 36.

The upper face of the deflector 37 is rounded as shown, so that theemulsion striking thereon is all deflected outwardly towardthe moldwall, as clearly shown in 3. Thus the deflector acts to correct abnormaldeflections caused by the mold wall configuration. The constructionenables bell end molds to be evenly and uniformly covered with thefacing material at a single operation.

The rod 32 passes through the hubs 31 and 88, and is engaged by a nut 40at its lower end. Above the bar 34L, the rod 82 is connected with alever or handle Al intermediate the ends thereof. The lever is pivotedat one end of the bar as indicated at as, and the other end is formedinto a grip for convenience in manipulating the lever. in order to holdthe valve closed during the positioning of the device, a latch bar 43 ispivoted to the lever. This latch is adapted to engage a notch 44 in thebar 34: to hold the valve 230 closed. It will be obvious that when thelatch is so engaged, the lever will occupy the full line position ofFig. 3, and the valve will be held closed.

The container is seated on the mold in the manner shown in Fig. 3. Thevalve 30 is closed, and the latch is operated to hold it closed. Asuitable quantity of the emulsion is placed in the container. hen nowthe latch is released the valve is forced open, and the emulsion flowsout as indicated in Fig. 3. That portion thereof which is deflectedinwardly by the ledge 86 is deflected outwardly by the valve ordeflector 37 and the mold wall is thoroughly and evenly coated with theemulsion.

it will be evident that with the parts arranged in the dotted lineposition of Fig. 3 the emulsion might be thrown directly into thecontainer and would be perfectly distributed, without the necessity ofany manipulation of the deflectors 3087. The in vention contemplates inits broadest aspect, the provision of deflectors one or more in numberso arranged as to correct deflections of the facing emulsion from themold wall by variations in the cross section of the mold.

I claim:

1. Apparatus for applying liquid facing to a refractory mold, having abore of variable cross-section, including a container havin an outletand means to engage the mold to center the outlet with respect thereto,and a deflector for each portion of the mold of larger diameter sodisposed with respect to the container and outlet that when the outletis open the deflector will be adjacent said portion of larger diameterand in position to deflect the liquid flowing from said portionoutwardly. v

2. Apparatus for applying liquid facing to a refractory mold. having abore of vari-' able crosssection, including a container having an outletand means to engage the mold to center the outlet with respect thereto,and a deflector for each portion of the mold of larger diameter sodisposed with respect to the container and outlet that when the out--let is open the deflector will be adjacent said portion of largerdiameter and in position to deflect the liquid flowing from said portionoutwardly, one deflector serving as a valve to close the outlet.

8. isipparatus for applying liquid facing to a refractory mold, havmg abore of va-- riable cross-section, including a container having anoutlet and means to engage the mold to center the outlet with respectthereto, and a deflector for each portion of the mold of larger diameterso disposed with respect to the container and outlet that when theoutlet is open the deflector will be adjacent said portion of largerdiameter and in position to deflect the liquid flowing from said portionoutwardly, one deflector serving as a valve to close the outlet, thedeflectors connected in rigidly spaced relation.

4. Apparatus for applying liquid facing to a refractory mold, having abore of variable cross-section, including a container having an outletand means to engage the mold to center the outlet with respect thereto,and a deflector for each portion of the mold of larger diameter sodisposed with respect to the container and outlet that when the outletis open the deflector will be adjacent said portion of larger diameterand in position to deflect the liquid flowing from said portionoutwardly, each deflector corresponding in outline substantially tocrosssection of the mold.

5. Apparatus for applying liquid facing to refractory molds havingrefractory ring cores at the pouring end, comprising a nozble of uniformcross section, and of dimensions to pass through the ring and extendinto the mold, and a receptacle for the liquid tapering smoothly towardthe nozzle, and forming a continuation thereof, a manually operablevalve for closing the nozzle, and means on the receptacle to engage theflask stripping plate to limit the inward movement of the nozzle.

6. Apparatus for applying liquid. facing to refractory molds havlngrefractory ring cores at the pouring end, comprising a nozzle of uniformcross section, and of dimensions to pass through the ring and extendinto the mold, and a receptacle for the liquid tapering smoothly towardthe nozzle, and forming a continuation thereof, a manually operablevalve for closing the nozzle, and means on the receptacle to engage theflask stripping plate to limit the inward movement of the nozzle, thenozzle having means to cooperate with'the stri n iing plate to centerthe nozzle ivi respect to the mold.

7. Apparatus for applying liquid facing to refractory mol s having re"'actory ring cores at the pour end, comprising a nozzle of uniform crosssection, and of dimensions to pass through the ring and extend into themold, and a receptacle for the liquid. tapering smoothly toward therozzle, and forming a continuatioi'z thereof, a manually operable valvefor closing the nozzle, and means on the receptacle to engage the flaskstripping plate to limit the inward movement of the nozzle, said valveof diameter co-ex tensive with that of the nozzle, and acting as adeflector for deflecting the outflowing liquid laterally and upwardly.

8. Apparatus for applying liguid facing to refractory molds having 1'ctory ring cores at the pouring end, comprisin a nozzle of uniform crosssection. and of dimensions to pass through the r 1g and ez-ttend. intothe mold, and a receptacle for the liquid tapering smoothly toward thenozzle, and forming a continuation thereof, a manually operable valvefor closing the nozzle, means on the receptacle engaging the flaskstripping plate to limit the inward movement of the nozzle, andreleasable means to hold the valve closed.

9. Apparatus for applying liquid facing to refractory molds, havirefractory ring cores, comprising a nozzle of dimensions to fit looselyin the ring and to extend beyond the same into the mold, a receptacletapering toward the nozzle and forming a continuation thereof, thereceptacle having means to engage the flask to limit the movement of thenozzle into the mold, and a manually operable combined valve anddistributor for closing the nozzle.

10. Apparatus for wet facing molds, ineluding a receptacle having adischarge nozzle of uniform cross section, the receptacle taperingsmoothly toward the nozzle and merging therewith, a valve for the nozzleclosing against the end thereof, and means to operate the valve.

11. Apparatus for applying liquid facing to refractory molds, includinga receptacle, having a nozzle to extend into the mold,

said nozzle having a normally closed annular discharge port, and meanson the receptacle to engage the mold to limit the inward movement of thenozzle.

12. Apparatus for applying liquid facing to refractory molds, includinga receptacle having a nozzle to extend into the mold, and means inconnect-ion with the nozzle to provide' an annular discharge, said meansincluding a disk valve closing against the end of thenozzle and servingas a deflector to discharge a portion of the liquid lateral to itsnormal flow and means for operating the valve.

13. Apparatus for applying liquid facing to refractory molds, includinga receptacle having a nozzle to extend into the mold and open at the endremote from the receptacle and a disk valve to close the open end.

Si 'ned at Birmin ham in the count of O b 7 y Jefferson, and State ofAlabama, this 2nd day of March A. D. 1926.

lVILLIAM DAVIS MOORE.

